Dwyer GFM - Manual (Page 11)

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TABLE II GFM-113 MEDIUM FLOW MASS FLOW METERS*
TABLE III GFM-1142 HIGH FLOW MASS FLOW METERS*
* Flow rates are stated for Nitrogen at STP conditions [i.e. 70 F F (21.1 F C) at 1 atm].
For other gases use the K factor as a multiplier from APPENDIX 2.
TABLE IV PRESSURE DROPS
FLOW RANGES
CODE
std liters /min [N
2
]
GFM-1111 /2111 0 to 15
GFM-1130 /2130 20
GFM-1131 /2131 30
GFM-1132 /2132 40
GFM-1133 /2133 50
CODE scc/min [N
2
] CODE std liters/min [N 2 ]
GFM-1101 /2101 0 to 10 GFM-1107 /2107 0 to 1
GFM-1102 /2102 0 to 20 GFM-1108 /2108 0 to 2
GFM-1103 /2103 0 to 50 GFM-1109 /2108 0 to 5
GFM-1104 /2104 0 to 100 GFM-1110 /2110 0 to 10
GFM-1105 /2105 0 to 200
GFM-1106 /2106 0 to 500
CODE std liters /min [N 2 ]
GFM-1140 /2140 60
GFM-1141 /2141 80
GFM-1142 /2142 100
GFM-1143 /2143 200
GFM-1144 /2144 500
GFM-1145 /2145 1000
MODEL
FLOW RATE
[std liters /min]
MAXIMUM PRESSURE DROP
[mm H
2
O] [psid] [mbar]
GFM-110 up to 10 25 0.04 2.5
GFM-111 /113
15 63 0.09 6.4
20 300 0.44 30
30 800 1.18 81
40 1480 2.18 150
50 2200 3.23 223
GFM-1140 60 3100 4.56 314
GFM-1142 100 5500 8.08 557
GFM-1143 200 2720 4.0 280
GFM-1144 500 3400 5.0 340
GFM-1145 1000 6120 9.0 620
TABLE I GFM-110 /111 LOW FLOW MASS FLOW METERS*